srcu: Make Classic and Tree SRCU announce themselves at bootup (1f4f6da1) · Commits · 戴 / test

Currently, the only way to tell whether a given kernel is running Classic, Tiny, or Tree SRCU is to look at the .config file, which can easily be lost or associated with the wrong kernel. This commit therefore has Classic and Tree SRCU identify themselves at boot time. Signed-off-by:

Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/srcu.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -659,3 +659,10 @@ void process_srcu(struct work_struct *work)
		srcu_reschedule(sp);
		}
		EXPORT_SYMBOL_GPL(process_srcu);

		static int __init srcu_bootup_announce(void)
		{
		pr_info("Classic SRCU implementation.\n");
		return 0;
		}
		early_initcall(srcu_bootup_announce);

kernel/rcu/srcutree.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -1167,3 +1167,10 @@ void srcutorture_get_gp_data(enum rcutorture_type test_type,
		*gpnum = rcu_seq_ctr(sp->srcu_gp_seq_needed);
		}
		EXPORT_SYMBOL_GPL(srcutorture_get_gp_data);

		static int __init srcu_bootup_announce(void)
		{
		pr_info("Hierarchical SRCU implementation.\n");
		return 0;
		}
		early_initcall(srcu_bootup_announce);

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